新萃取劑實驗報告

一實驗?zāi)康尿炞C鈷車間p204進(jìn)入鎳鈷分離段中是否會對鎳鈷分離能力產(chǎn)生影響；檢驗國產(chǎn)G272萃取劑的鎳鈷分離能力，同時與6500進(jìn)行混合萃取，觀察其萃取效果。二實驗前期準(zhǔn)備純G272比重約在0.9純6500比重0.92萃取劑皂化前氫離子濃度皂化率皂化后氫離子濃度15%APT65000.47650.1515%G2720.34650.1221%G2720.45650.157.5%G272+7.5%65000.45650.15根據(jù)萃取劑比重和稀釋后氫離子濃度對比，推測G272濃度較低。三實驗方案將以上4種配好的萃取劑同時進(jìn)行萃取實驗，對比每次的萃取分離效果。取現(xiàn)場鎳鈷分離段的各級溶液，作為含鈷濃度不同的溶液，按照現(xiàn)場萃取方向進(jìn)行萃取。水油相比1:16級時取430ml萃取劑，萃取后取出60ml有機化驗，8級再取出60ml有機化驗，10級取出60ml有機化驗用級數(shù)6789101112有機體積(ml)430370370310310250250分配比D和萃取率E是萃取的重要參數(shù)，被萃取物的數(shù)值越大，表明該物質(zhì)越容易被萃??；分配比D=有機相中被萃取物的總濃度/水相中被萃取物的總濃度萃取率E=*100%；分離系數(shù)β是表示兩種物質(zhì)萃取分離難易程度的實驗參數(shù)，β=DA/DB四實驗結(jié)果表１各級萃取前液成分(g/L)NiCoMgCaCuFeZnMn6級80.801.646.670.700.000480.000710.00110.000948級87.045.936.050.680.000450.000860.00100.001310級91.607.005.830.660.000460.000950.00110.001412級101.206.605.720.650.000350.00100.00110.0023洗鎳液17.6511.276.570.520.000470.000460.000380.00014表221%G272萃余液與有機相成分及各級分配比，萃取率，分離系數(shù)21%G2726級8級10級12級水相Co0.0773.396.767.12油相Co1.766.397.647.35水相Ni79.2087.3692.8896.00油相Ni0.870.330.220.23DCo22.8571.8851.1301.032DNi0.0110.0040.0020.002ECo95.8%65.3%53.1%50.8%ENi1.09%0.38%0.24%0.24%β2078471565516表315%G272萃取劑各項參數(shù)15%G2726級8級10級12級水相Co0.194.526.937.18油相Co1.565.005.395.29水相Ni80.4087.8494.4096.88油相Ni0.460.210.190.25DCo8.2111.1060.7780.737DNi0.0060.0020.0020.003ECo89.1%52.5%43.8%42.4%ENi0.57%0.24%0.20%0.26%β1369553389246表415%6500萃取劑各項參數(shù)15%65006級8級10級12級水相Co0.0543.376.767.55油相Co0.936.897.547.58水相Ni79.2088.0094.4097.60油相Ni0.460.130.0590.061DCo17.2222.0451.1151.004DNi0.0060.0010.0010.001ECo94.5%67.2%52.7%50.1%ENi0.58%0.15%0.06%0.06%β2870204511151004表51:1混合有機萃取各項參數(shù)1:1混合6級8級10級12級水相Co0.0563.316.897.34油相Co0.976.347.737.78水相Ni77.6086.0096.0096.88油相Ni0.410.300.160.16DCo17.3211.9151.1221.060DNi0.0050.0030.0020.002ECo94.54%65.70%52.87%51.46%ENi0.53%0.35%0.17%0.16%β3464638561530五結(jié)論6級到12級萃取前液鈷含量是從低到高，萃取劑鈷含量也由低到高分配比，萃取率，分離系數(shù)應(yīng)該隨著萃取劑中的鈷含量的上升而減小。這四種萃取劑均能實現(xiàn)鎳鈷的分離。觀察15%G272萃取劑，因其可用氫離子少（0.34），最終有機相鈷含量較低只有5.29g/L。觀察21%G272，15%6500，1:1混合萃取劑的3組萃取效果，有機相中鈷含量均在7.0g/L以上，鎳含量均在0.25g/L以下。分析這3組萃取參數(shù)可以看到，同級數(shù)下6500的分配比，萃取率，分離系數(shù)均高于新萃取劑G272，6500萃取劑鎳鈷分離系數(shù)在G272分離系數(shù)的兩倍以上。混合萃取劑的分配比，萃取率，分離系數(shù)與6500相比均有所下降。附各化驗數(shù)據(jù)6級液NiCoMgCaCuFeZnMn21%G27279.200.0774.740.640.000300.00100.00100.0007515%G27280.400.195.040.620.000270.000760.000970.0007815%650079.200.0544.340.660.000250.00150.000950.000741:1混合77.600.0568級液NiCoMgCaCuFeZnMn21%G27287.363.396.550.790.000300.00100.00100.0009915%G27287.844.525.940.700.000290.000810.00100.001015%650088.003.370.000990.710.000280.00150.00100.000991:1混合86.003.3110級液NiCoMgCaCuFeZnMn21%G27292.886.765.780.740.000350.00120.00110.001215%G27294.406.935.270.690.000320.000930.00110.001315%650094.406.765.640.670.000280.00140.00110.00121:1混合96.006.8912級液NiCoMgCaCuFeZnMn21%G27296.007.125.750.700.000360.00120.000990.001615%G27296.887.185.330.690.000360.000880.00110.001715%650097.607.555.630.690.000340.00140.00110.00161:1混合96.887.346級油NiCoMgCaCuFeZnMn21%G2720.871.762.630.0840.000350.000470.000460.0009915%G2720.461.561.670.0340.000550.000940.000340.0009615%65000.460.933.330.00860.000360.00120.000200.00101:1混合0.410.978級油NiCoMgCaCuFeZnMn21%G2720.336.390.710.0140.000600.000590.000510.001915%G2720.215.000.370.0120.000410.000970.000400.0001615%65000.136.890.750.00200.000530.00120.000200.00211:1混合0.306.3410級油NiCoMgCaCuFeZnMn21%G2720.227.640.330.00830.000860.00200.000560.002315%G2720.195.390.200.00670.000610.00110.000440.001815%65000.0597.540.330.00130.000740.00110.000270.00281:1混合0.167.7312級油NiCoMgCa